US6240643B1 - Cutting head for a wire cutting machine, in particular a strimmer - Google Patents

Cutting head for a wire cutting machine, in particular a strimmer Download PDF

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Publication number
US6240643B1
US6240643B1 US09/214,063 US21406399A US6240643B1 US 6240643 B1 US6240643 B1 US 6240643B1 US 21406399 A US21406399 A US 21406399A US 6240643 B1 US6240643 B1 US 6240643B1
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United States
Prior art keywords
tubular wall
cutting head
filiform elements
hub
axially symmetrical
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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US09/214,063
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English (en)
Inventor
Davide Civalleri
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Individual
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Individual
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Publication of US6240643B1 publication Critical patent/US6240643B1/en
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters
    • A01D34/4168—Constructional details of the flexible lines
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters
    • A01D34/4166—Mounting or replacement of the lines

Definitions

  • the present invention relates to a cutting head for a wire cutting machine, in particular a string trimmer.
  • Wire cutting machines which comprise a substantially cylindrical hub, and a number of filiform elements, each comprising an end portion connected to the hub, and each extending from the hub substantially radially; and the hub is connected to an output shaft rotated by an electric motor or combustion engine of the machine to rotate the filiform elements at high speed and so perform the desired cutting action.
  • the spin imparted to the filiform elements by the high rotation speed of the hub may be such as to detach the elements from the hub, thus resulting in injury to the user.
  • a cutting head for a wire cutting machine in particular a string trimmer as claimed in claim 1 .
  • FIG. 1 shows an exploded view in perspective of a cutting head for a cutting machine, in particular a string trimmer, in accordance with the teachings of the present invention
  • FIG. 2 shows a top plan view of a first element of the FIG. 1 cutting head
  • FIG. 3 shows a section of the first element along line III—III in FIG. 2;
  • FIG. 4 shows a top plan view of a second element of the FIG. 1 cutting head
  • FIG. 5 shows a section of the second element along line V—V in FIG. 4 .
  • Number 1 in FIG. 1 indicates a cutting head for a wire cutting machine, in particular a string trimmer.
  • Head 1 comprises a hub 4 , and a number of filiform elements 7 fitted to and extending radially from hub 4 ; and hub 4 is connected to an output shaft 9 rotated by a motor—e.g. an electric motor or combustion engine (not shown)—of the machine to rotate filiform elements 7 at high speed.
  • a motor e.g. an electric motor or combustion engine (not shown)—of the machine to rotate filiform elements 7 at high speed.
  • hub 4 comprises an axially symmetrical first body 11 having seating means for housing filiform elements 7 ; and an axially symmetrical second body 14 connectable to first body 11 to firmly clamp filiform elements 7 inside the seating means.
  • first body 11 comprises a substantially disk-shaped base portion 17 ; and a cylindrical tubular wall 19 extending integrally from a flat face 21 of base portion 17 and coaxially with an axis 23 perpendicular to face 21 .
  • Wall 19 has an outside diameter d smaller than the diameter D of base portion 17 , is defined externally by a cylindrical surface on which is formed a thread 26 , and comprises a number of radial slots (six in the example shown) 28 equally spaced angularly about wall 19 (FIG. 2) and extending the full height h of wall 19 (FIG. 3 ).
  • Each slot is defined laterally by two facing surfaces of wall 19 , and at the bottom by a portion of face 21 ; and first body 11 is conveniently molded from plastic material, e.g. nylon.
  • second body 14 is substantially cylindrical, is defined by a cylindrical lateral wall 29 and by two opposite end walls 30 , 31 , and defines an inner cylindrical cavity 32 coaxial with axis 33 and communicating externally of body 14 through a circular opening 34 in wall 31 .
  • Cylindrical cavity 32 has a diameter substantially equal to diameter d, and is defined laterally by a cylindrical lateral wall having a thread 37 , and by a flat bottom wall 39 perpendicular to axis 33 ; and a cylindrical opening 41 extends coaxially with axis 33 from bottom wall 39 , communicates externally of body 14 on the opposite side to opening 34 , and provides for housing output shaft 9 in angularly fixed manner.
  • Each pair of filiform elements 7 is defined by respective end portions 7 a , 7 b of a single wire comprising a C-shaped intermediate portion 7 c fitted firmly to hub 4 . More specifically, intermediate portion 7 c is fitted inside wall 19 , and engages two adjacent radial slots 28 (FIG. 2) from which the wire comes out with end portions 7 a , 7 b outside wall 19 ; the sector of wall 19 between the two adjacent slots 28 acts as a radial stop for intermediate portion 7 c ; and second body 14 is connected to first body 11 by screwing wall 19 inside cylindrical cavity 32 to grip intermediate portion 7 c of the wire between face 21 and wall 31 .
  • intermediate portion 7 c of the wire is connected firmly to hub 4 by the pressure exerted on the wire by bodies 11 and 14 , and, even when hub 4 is rotated at high speed, detachment of the filiform elements is prevented by intermediate portion 7 c being firmly housed inside wall 19 by the connection of bodies 11 and 14 , and being prevented from moving radially by the constraint defined by the sector of wall 19 between the two adjacent slots 28 .

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)
  • Wire Processing (AREA)
  • Scissors And Nippers (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Shearing Machines (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
US09/214,063 1996-06-28 1997-06-27 Cutting head for a wire cutting machine, in particular a strimmer Expired - Fee Related US6240643B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITTO96A0559 1996-06-28
IT96TO000559A IT1286137B1 (it) 1996-06-28 1996-06-28 Testa di taglio per attrezzo di taglio a filo, in particolare tagliaerba
PCT/IT1997/000154 WO1998000004A1 (en) 1996-06-28 1997-06-27 Cutting head for a wire cutting machine, in particular a strimmer

Publications (1)

Publication Number Publication Date
US6240643B1 true US6240643B1 (en) 2001-06-05

Family

ID=11414748

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/214,063 Expired - Fee Related US6240643B1 (en) 1996-06-28 1997-06-27 Cutting head for a wire cutting machine, in particular a strimmer

Country Status (10)

Country Link
US (1) US6240643B1 (pt)
EP (1) EP0910237B1 (pt)
AT (1) ATE191603T1 (pt)
AU (1) AU3274097A (pt)
DE (1) DE69701695T2 (pt)
DK (1) DK0910237T3 (pt)
ES (1) ES2147005T3 (pt)
IT (1) IT1286137B1 (pt)
PT (1) PT910237E (pt)
WO (1) WO1998000004A1 (pt)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1293116A1 (en) * 2001-09-14 2003-03-19 John R. Fogle Auto-loading fixed-line trimmer head
WO2003103372A1 (fr) * 2002-06-07 2003-12-18 Speed France Nouvel ensemble de coupe et nouveau filament de coupe pour un appareil de coupe de vegetaux
US20040128838A1 (en) * 2003-01-06 2004-07-08 Hurst John O. Filament trimmer head with screw on cap
US20060048395A1 (en) * 2003-01-23 2006-03-09 Emmanuel Legrand Cutting head for a brush cutter, edge trimmer or similar
US20060048396A1 (en) * 2003-01-23 2006-03-09 Emmanuel Legrand Cutting head for a brush cutter, edge trimmer or similar
US20060053635A1 (en) * 2003-01-23 2006-03-16 Emmanuel Legrand Cutting head for a brush cutter, edge trimmer or similar
US20060090350A1 (en) * 2003-01-23 2006-05-04 Emmanuel Legrand Cutting head for a brush cutter, edge trimmer or similar
US20060112568A1 (en) * 2004-12-01 2006-06-01 Orlando Jerez Universal, trimmer line, hook disk system
US20060242842A1 (en) * 2003-01-23 2006-11-02 Emmanuel Legrand Cutting head for a brush cutter, edge trimmer or similar
US20070123092A1 (en) * 2003-05-14 2007-05-31 Emmanuel Legrand Novel cutting wire for devices such as edge trimmers or brush cutters
US20080233398A1 (en) * 2004-01-19 2008-09-25 Emmanuel Legrand Method for the Production of Plant Cutting Filaments and Plant Cutting Filaments
US20090038163A1 (en) * 2007-08-10 2009-02-12 Orlando Jerez Weed trimming apparatus, weed trimmer head, and trimmer line retention device
US7607233B2 (en) 2001-09-03 2009-10-27 Speed France Cutting wire for brush cutters and edge trimmers
US9210838B2 (en) 2010-06-01 2015-12-15 Orlando Jerez Rotary trimmer apparatus and related rotary head assembly
US9642302B2 (en) 2010-06-01 2017-05-09 Orlando Jerez Rotary trimmer apparatus and related rotary head assembly
US20170238461A1 (en) * 2016-02-22 2017-08-24 Mtd Products Inc Miulti-mode trimmer head
US10070582B2 (en) 2016-04-20 2018-09-11 Tti (Macao Commercial Offshore) Limited String trimmer head
US11252866B1 (en) * 2018-03-08 2022-02-22 Richard Lang Universal string trimmer head

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR980100173A (el) * 1998-05-12 2000-01-31 *�65tF fs@ �5st*5 f@*66 0� f9 st 9 t*s@65 υ#0@Ν υθv#0
FR2789261B1 (fr) * 1999-02-10 2001-05-04 Claude Leroux Tete rotative multi-fils
DE102012016026B4 (de) 2012-08-13 2016-03-03 Auerswald-Wolff S.A.R.L. Schneidkopf für Motorsensen mit vertikaler Schneidfadenausrichtung

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663137A (en) * 1951-08-01 1953-12-22 Asbury Corp Lawn edger
US4043037A (en) * 1975-10-15 1977-08-23 Kioritz Corporation Cord-type mowing tool
US4062115A (en) * 1976-11-02 1977-12-13 Leeco Manufacturing, Inc. Rotary garden cutter
US4190954A (en) * 1978-06-29 1980-03-04 The Toro Company Cutting heads
US4685279A (en) * 1986-01-17 1987-08-11 Gullett Bradley T Weed trimmer
US4726176A (en) * 1985-10-24 1988-02-23 Mcgrew David L Rotary mower cutter means
US4756146A (en) * 1987-02-18 1988-07-12 Snapper Power Equipment Division Of Fuqua Industries, Inc. String trimmer head and method
US5048278A (en) * 1989-09-18 1991-09-17 Trim-A-Lawn Rotary cutting member for use with lawn mowers and the like
US5768867A (en) * 1996-08-19 1998-06-23 Carlsen; Harry R. Rotary blade for cutting grass and the like
US5836227A (en) * 1995-03-31 1998-11-17 Dees, Jr.; John M. Weed cutter head
US5852876A (en) * 1997-04-09 1998-12-29 Sufix Usa, Inc. Vegetation trimmer head
US6052907A (en) * 1997-04-09 2000-04-25 Sufix Usa, Inc. Vegetation trimmer head

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663137A (en) * 1951-08-01 1953-12-22 Asbury Corp Lawn edger
US4043037A (en) * 1975-10-15 1977-08-23 Kioritz Corporation Cord-type mowing tool
US4062115A (en) * 1976-11-02 1977-12-13 Leeco Manufacturing, Inc. Rotary garden cutter
US4190954A (en) * 1978-06-29 1980-03-04 The Toro Company Cutting heads
US4726176A (en) * 1985-10-24 1988-02-23 Mcgrew David L Rotary mower cutter means
US4685279A (en) * 1986-01-17 1987-08-11 Gullett Bradley T Weed trimmer
US4756146A (en) * 1987-02-18 1988-07-12 Snapper Power Equipment Division Of Fuqua Industries, Inc. String trimmer head and method
US5048278A (en) * 1989-09-18 1991-09-17 Trim-A-Lawn Rotary cutting member for use with lawn mowers and the like
US5836227A (en) * 1995-03-31 1998-11-17 Dees, Jr.; John M. Weed cutter head
US5768867A (en) * 1996-08-19 1998-06-23 Carlsen; Harry R. Rotary blade for cutting grass and the like
US5852876A (en) * 1997-04-09 1998-12-29 Sufix Usa, Inc. Vegetation trimmer head
US6052907A (en) * 1997-04-09 2000-04-25 Sufix Usa, Inc. Vegetation trimmer head

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7607233B2 (en) 2001-09-03 2009-10-27 Speed France Cutting wire for brush cutters and edge trimmers
EP1293116A1 (en) * 2001-09-14 2003-03-19 John R. Fogle Auto-loading fixed-line trimmer head
US7370424B2 (en) 2002-06-07 2008-05-13 Speed France Cutting string for plant cutting appliance
WO2003103372A1 (fr) * 2002-06-07 2003-12-18 Speed France Nouvel ensemble de coupe et nouveau filament de coupe pour un appareil de coupe de vegetaux
US20050188547A1 (en) * 2002-06-07 2005-09-01 Emmanuel Legrand Cutting string for plant cutting appliance
US7543387B2 (en) 2002-06-07 2009-06-09 Speed France Cutting unit and cutting filament for a plant cutting device
US20040128838A1 (en) * 2003-01-06 2004-07-08 Hurst John O. Filament trimmer head with screw on cap
US7587828B2 (en) 2003-01-23 2009-09-15 Speed France Cutting head for a brush cutter, edge trimmer or similar
US20060048395A1 (en) * 2003-01-23 2006-03-09 Emmanuel Legrand Cutting head for a brush cutter, edge trimmer or similar
US20060048396A1 (en) * 2003-01-23 2006-03-09 Emmanuel Legrand Cutting head for a brush cutter, edge trimmer or similar
US20060242842A1 (en) * 2003-01-23 2006-11-02 Emmanuel Legrand Cutting head for a brush cutter, edge trimmer or similar
US20060053635A1 (en) * 2003-01-23 2006-03-16 Emmanuel Legrand Cutting head for a brush cutter, edge trimmer or similar
US20060090350A1 (en) * 2003-01-23 2006-05-04 Emmanuel Legrand Cutting head for a brush cutter, edge trimmer or similar
US20070123092A1 (en) * 2003-05-14 2007-05-31 Emmanuel Legrand Novel cutting wire for devices such as edge trimmers or brush cutters
US9445542B2 (en) 2003-05-14 2016-09-20 Speed France Cutting wire for devices such as edge trimmers or brush cutters
US20080233398A1 (en) * 2004-01-19 2008-09-25 Emmanuel Legrand Method for the Production of Plant Cutting Filaments and Plant Cutting Filaments
US7829002B2 (en) 2004-01-19 2010-11-09 Speed France Method for the production of plant cutting filaments
US20080034724A1 (en) * 2004-12-01 2008-02-14 Orlando Jerez Powered Disk Preferably with Oscillateable, Trimmer-Line-Hook Mounts
EP1841308A2 (en) * 2004-12-01 2007-10-10 JEREZ, Orlando Powered disk preferably with oscillateable, trimmer-line-hook mounts
WO2006060483A3 (en) * 2004-12-01 2006-08-17 Orlando Jerez Powered disk preferably with oscillateable, trimmer-line-hook mounts
US7603782B2 (en) * 2004-12-01 2009-10-20 Orlando Jerez Universal, trimmer line, hook disk system
US20060112568A1 (en) * 2004-12-01 2006-06-01 Orlando Jerez Universal, trimmer line, hook disk system
US7743511B2 (en) 2004-12-01 2010-06-29 Orlando Jerez Powered disk preferably with oscillateable, trimmer-line-hook mounts
EP1841308A4 (en) * 2004-12-01 2012-08-01 Orlando Jerez DRIVEN DISC, PREFERABLY WITH SWIVEL HOOK FITTINGS FOR A CUTTING THREAD
US20090038163A1 (en) * 2007-08-10 2009-02-12 Orlando Jerez Weed trimming apparatus, weed trimmer head, and trimmer line retention device
US9603301B2 (en) 2007-08-10 2017-03-28 Orlando Jerez Weed trimming apparatus, weed trimmer head, and trimmer line retention device
US9210838B2 (en) 2010-06-01 2015-12-15 Orlando Jerez Rotary trimmer apparatus and related rotary head assembly
US9642302B2 (en) 2010-06-01 2017-05-09 Orlando Jerez Rotary trimmer apparatus and related rotary head assembly
US20170238461A1 (en) * 2016-02-22 2017-08-24 Mtd Products Inc Miulti-mode trimmer head
US10517210B2 (en) * 2016-02-22 2019-12-31 Mtd Products Inc Multi-mode trimmer head
US10070582B2 (en) 2016-04-20 2018-09-11 Tti (Macao Commercial Offshore) Limited String trimmer head
US11252866B1 (en) * 2018-03-08 2022-02-22 Richard Lang Universal string trimmer head

Also Published As

Publication number Publication date
DK0910237T3 (da) 2000-08-21
EP0910237B1 (en) 2000-04-12
WO1998000004A1 (en) 1998-01-08
ITTO960559A1 (it) 1997-12-28
ES2147005T3 (es) 2000-08-16
ITTO960559A0 (pt) 1996-06-28
DE69701695D1 (de) 2000-05-18
EP0910237A1 (en) 1999-04-28
IT1286137B1 (it) 1998-07-07
ATE191603T1 (de) 2000-04-15
AU3274097A (en) 1998-01-21
DE69701695T2 (de) 2000-11-02
PT910237E (pt) 2000-09-29

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